As I said earlier, I might request an available nation soon, but I don't know which available territory I can choose. I was thinking of getting UL015h, but I can't decide if I should request that nation or a different available nation.

I would like to welcome you there as well! My edits are in Mergany, just a few miles away from UL015h in north-western direction.

What might be important for new territories is that you have active neighbors (it turned out for me to be important, but at the time I have chosen mine I didn't care about it). It might motivate you and it's easy to collaborate if someone is next door to you. This is also the case there, there is Mauretia in the north, a really nice and fast developing country, Belphenia in the south, and also Orinoco is not far away!